А is usually formed by a
group of representatives elected by the
people of a country,

Bicameral legislature.

Explanation:

The type of government in which legislators such as a senator and house of representative members are elected is known as a democracy. Democracy refers to a government of the people, by the people and for the people.

A bicameral legislature is usually formed by a group of representatives elected by the people of a country.

A bicameral legislature can be defined as a legislative body that comprises of two chambers or houses; upper house and lower house. The upper chamber or house consists of senators while the lower chamber consists of house of representatives. These legislators are elected by the people of the state they are representing and as such they must be an indigene of that particular state.

The primary function of these legislators is to make (enact) laws and that is why they're usually referred to as the legislative arm of government (legislature). In addition to making laws, legislators are saddled with the responsibility of confirming any appointment made by the president that requires consent and the ratification of treaties.

missouri compromise of 1820 which prohibited slavery